Donaldson Fuel Filter & Water Separator Cartridge (P551011)

The Donaldson P551011 fuel filter and water separator cartridge is engineered for heavy-duty diesel engines, helping to protect fuel injectors and pump systems by removing water and contaminants. Built with premium filtration media and durable construction to withstand harsh service conditions. 

Features:

• Cartridge style filter and water separator design

• Efficiency rating: ~50% at 25 micron

• Outer Diameter: ~5.83″ (148 mm) 

• Length: approx. 7.6″ (193 mm) 

• Thread Size: 1-14 UN 

• Designed to separate water and fine particles in the fuel to improve system reliability 

Applications:
Ideal for heavy-duty trucks and diesel engines where fuel water-separation and contamination control are critical. Commonly used in systems with on-board water separators, high-performance injection systems, and fleet service applications.

Cross References:

• Baldwin: PF9804
• Gates: 33655
• WIX: 33655
• Fleetguard: FS19915
• Alliance ABP/N10G-FS19915
• Detroit Diesel FS19915WE
• A0000903651, A4720921205
• FX41011